Skeletons & Muscles
Which of these animals has a skeleton without hard parts?
a. whale
b. lobster
c. goldfish
d. jellyfish
What is a jellyfish.
What is information that travels as an electrical message.
What is an impulse.
List 3 reasons for animals to move.
What is obtaining food, defending themselves, finding protection, maintaining homeostasis, and finding mates.
A ________ is a place where two or more parts of a skeleton meet.
What is a joint.
A rock hits a turtle on its shell. Then the turtle hides inside its shell. What is the stimulus?
a. the turtle hiding
b. the turtle's shell
c. a rock hitting the shell
What is a rock hitting the shell.
What happens to an arthropod during molting?
What is it sheds its exoskeleton.
What is a nerve cell with a unique structure for receiving and passing on information.
What is a neuron.
What is an internal, gas-filled sac that helps a fish to stay at a certain water depth called?
What is a swim bladder.
A signal that causes an animal to react in some way is called a _____________.
What is a stimulus.
An animal that moves using a water vascular system is a _________.
a. sea star
b. penguin
c. squid
What is a sea star.
A jellyfish skeleton is made up of fluid-filled cavities surrounded by _______________.
What is muscle.
What is the function of sensory neurons?
What is to detect stimuli.
Echinoderms have a system of fluid-filled tubes known as a(n) ______________.
What is a water vascular system.
The most complex nervous systems have a nerve cord and a _________.
What is a brain.
What enables an animal's endoskeleton to grow?
a. the animal molts
b. the animal's bone and cartilage contain living cells.
c. The animal's nervous system gets larger.
What is the animal's bone and cartilage contain living cells.
What materials make up the endoskeletons of most vertebrates.
What is they are made mostly of bone and cartilage.
How are a stimulus and a response related.
A stimulus is a signal that causes an animal to react in some way. A response is an animal's reaction to that stimulus.
What is the only mammal that flies?
A shark's endoskeleton is made up of _________, which is a tissue that is more flexible than bone.
What is cartilage.
Animals with nerve nets have
a. no specialized neurons
b. sensory neurons, but no interneurons
c. interneurons, but no sensory neurons
d. only motor neurons
What is no specialized neurons.
What are the three types of skeletons found in animals?
What is skeletons without hard parts, exoskeletons, and endoskeletons.
What are three functions of a brain?
What is a brain receives information, interprets it, and controls and animal's response.
Why is it useful for animals that live in water to have streamlined bodies?
Having a streamlined body allows an animal to move through the water more quickly and with less resistance.
Blinking in bright light is an example of a(n) ____________.
What is a response.
How might an endoskeleton affect the size of an animal?
An animal might be larger because an endoskeleton is light and grows with the animal.